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Aneli [31]
4 years ago
8

When the quantity q is greater than zero, __________ is added to the system?

Physics
1 answer:
Alex787 [66]4 years ago
6 0

Heat is added to the system.

The relation between thermal energy and temperature change in mass is given by the following expression

q = m•C•ΔT

where q is the quantity of heat transferred 

m is the mass 

C is the heat capacity of the material

ΔT is the temperature change 

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A 3.5 kg block slides along a frictionless horizontal with a speed of 2.5 m/s. After sliding a distance of 5 m, the block makes
Andru [333]

Answer:

  L = 0.416 m

Explanation:

In this exercise to calculate the distance traveled in the branch that climbs the block we can use the concepts of energy

Starting point Flat part

       Em₀ = K = ½ m v²

Final point. Highest part of the ramp

       Em_{f} = U = m g h

As there is no friction the mechanical energy is conserved

        Em₀ =  Em_{f}

        ½ m v² = m g h

       h = v² / 2g

       h = 2.5 2/2 9.8

       h = 0.3189 m

The distance traveled can be found with trigonometry

      sin 50 = h / L

      L = h / sin 50

      L = 0.3189 / sin50

      L = 0.416 m

3 0
4 years ago
When someone leaves an outside door open on a cold, still day, it is often said that the person is letting in cold air. If so, h
Vikentia [17]

Answer:

Diffusion

Explanation:

This process can be referred to as diffusion. The cold air moves from a region of high concentration (outside) to a region of low concentration (inside). The movement of these cold air is what is referred to as "letting in cold air".

NOTE: Diffusion is the process in which substances move from a region of high concentration to a region of low concentration. Just like when an insecticide is sprayed inside a closed room and then the room is later opened so as to allow the the sprayed insecticide leave the room.

8 0
4 years ago
Length of the year is equivalent to the time it takes for one
Black_prince [1.1K]

<span>The length of the year is equivalent to the time it takes for the earth to go around the sun one time.</span>
4 0
3 years ago
Read 2 more answers
Please help me i need some help!!!
Montano1993 [528]

Answer:

D on first page

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What causes melting of material under divergent plate boundaries?
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Melting: as mantle material rise toward the divergent plate boundary the pressure is reduced which causes melting
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